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From: "msebor at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug bootstrap/95970] New: gcc/go/gofrontend/types.cc:1474:34: warning: ‘this’ pointer null Date: Mon, 29 Jun 2020 16:00:47 +0000 [thread overview] Message-ID: <bug-95970-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95970 Bug ID: 95970 Summary: gcc/go/gofrontend/types.cc:1474:34: warning: ‘this’ pointer null Product: gcc Version: 11.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: bootstrap Assignee: unassigned at gcc dot gnu.org Reporter: msebor at gcc dot gnu.org Target Milestone: --- Since r11-1697 Go bootstrap fails due to the following warning turned error: In static member function ‘static Expression* Type::type_descriptor(Gogo*, Type*)’, inlined from ‘virtual Expression* Named_type::do_type_descriptor(Gogo*, Named_type*)’ at /ssd/test/src/gcc/trunk/gcc/go/gofrontend/types.cc:11114:53, inlined from ‘virtual Expression* Named_type::do_type_descriptor(Gogo*, Named_type*)’ at /ssd/test/src/gcc/trunk/gcc/go/gofrontend/types.cc:11105:1: /ssd/test/src/gcc/trunk/gcc/go/gofrontend/types.cc:1474:34: warning: ‘this’ pointer null [-Wnonnull] 1474 | return type->do_type_descriptor(gogo, NULL); The warning, issued from tree-ssa-ccp.c, is triggered by the use of the null pointer as the first argument in the following call for the IL below. _31 = OBJ_TYPE_REF(_30;(struct Type)0B->12) (0B, gogo_12(D), 0B); Named_type::do_type_descriptor (struct Named_type * const this, struct Gogo * gogo, struct Named_type * name) { struct Expression * D.404029; struct Expression * ret; bool _1; bool _2; bool _3; struct Type * _4; struct Expression * _5; struct Named_type * iftmp.1259_6; struct Expression * _14; struct Expression * _17; struct Expression * _19; struct Expression * _20; struct Named_type * iftmp.1259_21; struct Named_type * iftmp.1259_22; struct Expression * _24; struct Expression * _25; struct Expression * _27; struct Expression * _28; int (*) () * _29; int (*) () _30; struct Expression * _31; <bb 2> : _1 = this_9(D)->is_error_; if (_1 != 0) goto <bb 3>; [INV] else goto <bb 4>; [INV] <bb 3> : _27 = Expression::make_error (this_9(D)->location_); _28 = _27; goto <bb 13>; [INV] <bb 4> : if (name_10(D) == 0B) goto <bb 5>; [INV] else goto <bb 9>; [INV] <bb 5> : _2 = this_9(D)->is_alias_; if (_2 != 0) goto <bb 6>; [INV] else goto <bb 9>; [INV] <bb 6> : _3 = this_9(D)->seen_alias_; if (_3 != 0) goto <bb 7>; [INV] else goto <bb 8>; [INV] <bb 7> : _19 = Expression::make_error (this_9(D)->location_); _20 = _19; goto <bb 13>; [INV] <bb 8> : this_9(D)->seen_alias_ = 1; _29 = MEM[(struct Type *)0B]._vptr.Type; _30 = MEM[(int (*) () *)_29 + 96B]; _31 = OBJ_TYPE_REF(_30;(struct Type)0B->12) (0B, gogo_12(D), 0B); _33 = _31; _14 = _33; ret_15 = _14; this_9(D)->seen_alias_ = 0; _17 = ret_15; // predicted unlikely by early return (on trees) predictor. goto <bb 13>; [INV]
next reply other threads:[~2020-06-29 16:00 UTC|newest] Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-06-29 16:00 msebor at gcc dot gnu.org [this message] 2020-06-29 16:49 ` [Bug bootstrap/95970] " jamborm at gcc dot gnu.org 2020-06-29 17:14 ` msebor at gcc dot gnu.org 2020-06-29 17:33 ` msebor at gcc dot gnu.org 2020-06-29 17:38 ` ian at airs dot com 2020-06-29 17:54 ` msebor at gcc dot gnu.org 2020-06-29 21:29 ` cvs-commit at gcc dot gnu.org 2020-06-29 21:34 ` ian at airs dot com
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